FOR INSTALLER
Air-Conditioners
PUMY-SP112, SP125, SP140VKM PUMY-SP112, SP125, SP140YKM
For use with R410A
INSTALLATION MANUAL
For safe and correct use, read this manual and the indoor unit installation manual thoroughly before installing
the air-conditioner unit.
English (GB)
GB
Warning:
• The unit must not be installed by the user. Ask a dealer or an authorized technician to install the unit. If the unit is installed incorrectly, water leakage, electric shock, or fire may result.
• This appliance is intended to be used by expert or trained users in shops, in light industry and on farms, or for commercial use by lay persons.
• For installation work, follow the instructions in the Installation Manual and use tools and pipe components specifically made for use with R410A refrig- erant. The R410A refrigerant in the HFC system is pressurized 1.6 times the pressure of usual refrigerants. If pipe components not designed for R410A refrigerant are used and the unit is not installed correctly, the pipes may burst and cause damage or injuries. In addition, water leakage, electric shock, or fire may result.
• The unit must be installed according to the instructions in order to minimize the risk of damage from earthquakes, typhoons, or strong winds. An incor- rectly installed unit may fall down and cause damage or injuries.
• The unit must be securely installed on a structure that can sustain its weight.
If the unit is mounted on an unstable structure, it may fall down and cause damage or injuries.
• If the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration in the room from exceeding the safety limit in the event of refrigerant leakage. Consult a dealer regarding the appro- priate measures to prevent the allowable concentration from being exceeded.
Should the refrigerant leak and cause the concentration limit to be exceeded, hazards due to lack of oxygen in the room may result.
• Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact with a flame, poisonous gases will be released.
• All electric work must be performed by a qualified technician according to local regulations and the instructions given in this manual. The units must be powered by dedicated power lines and the correct voltage and circuit breakers must be used. Power lines with insufficient capacity or incorrect electrical work may result in electric shock or fire.
• Use C1220 copper phosphorus, for copper and copper alloy seamless pipes, to connect the refrigerant pipes. If the pipes are not connected correctly, the unit will not be properly grounded and electric shock may result.
• Use only specified cables for wiring. The wiring connections must be made securely with no tension applied on the terminal connections. Also, never splice the cables for wiring (unless otherwise indicated in this document).
Failure to observe these instructions may result in overheating or a fire.
• The terminal block cover panel of the outdoor unit must be firmly attached. If the cover panel is mounted incorrectly and dust and moisture enter the unit, electric shock or fire may result.
• The appliance shall be installed in accordance with national wiring regulations.
• If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.
• When installing or relocating, or servicing the air conditioner, use only the specified refrigerant (R410A) to charge the refrigerant lines. Do not mix it with any other refrigerant and do not allow air to remain in the lines.
If air is mixed with the refrigerant, then it can be the cause of abnormal high pressure in the refrigerant line, and may result in an explosion and other hazards.
The use of any refrigerant other than that specified for the system will cause mechanical failure or system malfunction or unit breakdown. In the worst case, this could lead to a serious impediment to securing product safety.
• Use only accessories authorized by Mitsubishi Electric and ask a dealer or an authorized technician to install them. If accessories are incorrectly installed, water leakage, electric shock, or fire may result.
• Do not alter the unit. Consult a dealer for repairs. If alterations or repairs are not performed correctly, water leakage, electric shock, or fire may result.
• The user should never attempt to repair the unit or transfer it to another loca- tion. If the unit is installed incorrectly, water leakage, electric shock, or fire may result. If the air conditioner must be repaired or moved, ask a dealer or an authorized technician.
• After installation has been completed, check for refrigerant leaks. If refriger- ant leaks into the room and comes into contact with the flame of a heater or portable cooking range, poisonous gases will be released.
1. Safety precautions
► Before installing the unit, make sure you read all the “Safety precau- tions”.
► Please report to or take consent by the supply authority before connec- tion to the system.
► PUMY-SP·VKM series complying with IEC/EN 61000-3-12
► PUMY-SP·VKM series is designed for use in the residential, commercial and light-industrial environment.
► PUMY-SP·YKM series is designed as professional equipment.
Confirmation of parts attached
In addition to this manual, the following part is supplied with the outdoor unit.
It is used for grounding the S terminal of transmission terminal block TB7. For details refer to “6. Electrical work”.
Caution:
• Do not vent R410A into the atmosphere.
1. Safety precautions ...2
2. Installation location ...4
3. Installing the outdoor unit ...7
4. Installing the refrigerant piping ...7
5. Drainage piping work ...15
6. Electrical work ...15
7. Test run ...24
8. Special functions ...25
Grounding lead wire
Warning:
Describes precautions that must be observed to prevent danger of injury or death to the user.
Caution:
Describes precautions that must be observed to prevent damage to the unit.
After installation work has been completed, explain the “Safety Precautions,” use, and maintenance of the unit to the customer according to the information in the Operation Manual and perform the test run to ensure normal operation. Both the Installation Manual and Operation Manual must be given to the user for keeping. These manuals must be passed on to subsequent users.
: Indicates a part which must be grounded.
Warning:
Carefully read the labels affixed to the main unit.
Contents
3
GB
1. Safety precautions
1.3. Before electric work
Caution:
• Be sure to install circuit breakers. If not installed, electric shock may result.
• For the power lines, use standard cables of sufficient capacity. Otherwise, a short circuit, overheating, or fire may result.
• When installing the power lines, do not apply tension to the cables. If the connections are loosened, the cables can snap or break and overheating or fire may result.
1.4. Before starting the test run
Caution:
• Turn on the main power switch more than 12 hours before starting operation.
Starting operation just after turning on the power switch can severely damage the internal parts. Keep the main power switch turned on during the operation season.
• Before starting operation, check that all panels, guards and other protective parts are correctly installed. Rotating, hot, or high voltage parts can cause injuries.
• Do not touch any switch with wet hands. Electric shock may result.
• Be sure to ground the unit. Do not connect the ground wire to gas or water pipes, lightning rods, or telephone grounding lines. If the unit is not properly grounded, electric shock may result.
• Use circuit breakers (ground fault interrupter, isolating switch (+B fuse), and molded case circuit breaker) with the specified capacity. If the circuit breaker capacity is larger than the specified capacity, breakdown or fire may result.
• Do not touch the refrigerant pipes with bare hands during operation. The refrigerant pipes are hot or cold depending on the condition of the flowing refrigerant. If you touch the pipes, burns or frostbite may result.
• After stopping operation, be sure to wait at least five minutes before turning off the main power switch. Otherwise, water leakage or breakdown may result.
1.5. Using R410A refrigerant air conditioners
Caution:
• Use C1220 copper phosphorus, for copper and copper alloy seamless pipes, to connect the refrigerant pipes. Make sure the insides of the pipes are clean and do not contain any harmful contaminants such as sulfuric compounds, oxidants, debris, or dust. Use pipes with the specified thickness. (Refer to 4.1.) Note the following if reusing existing pipes that carried R22 refrigerant.
- Replace the existing flare nuts and flare the flared sections again.
- Do not use thin pipes. (Refer to 4.1.)
• Store the pipes to be used during installation indoors and keep both ends of the pipes sealed until just before brazing. (Leave elbow joints, etc. in their packaging.) If dust, debris, or moisture enters the refrigerant lines, oil dete- rioration or compressor breakdown may result.
• Use ester oil, ether oil, alkylbenzene oil (small amount) as the refrigeration oil applied to the flared sections. If mineral oil is mixed in the refrigeration oil, oil deterioration may result.
• Do not use refrigerant other than R410A refrigerant. If another refrigerant is used, the chlorine will cause the oil to deteriorate.
• Use the following tools specifically designed for use with R410A refrigerant.
The following tools are necessary to use R410A refrigerant. Contact your nearest dealer for any questions.
Tools (for R410A)
Gauge manifold Flare tool
Charge hose Size adjustment gauge
Gas leak detector Vacuum pump adapter
Torque wrench Electronic refrigerant charging scale
• Be sure to use the correct tools. If dust, debris, or moisture enters the refriger- ant lines, refrigeration oil deterioration may result.
• Do not use a charging cylinder. If a charging cylinder is used, the composition of the refrigerant will change and the efficiency will be lowered.
1.2. Before installation (relocation)
Caution:
• Be extremely careful when transporting the units. Two or more persons are needed to handle the unit, as it weighs 20 kg or more. Do not grasp the pack- aging bands. Wear protective gloves to remove the unit from the packaging and to move it, as you can injure your hands on the fins or other parts.
• Be sure to safely dispose of the packaging materials. Packaging materials, such as nails and other metal or wooden parts may cause stabs or other injuries.
• The base and attachments of the outdoor unit must be periodically checked for looseness, cracks or other damage. If such defects are left uncorrected, the unit may fall down and cause damage or injuries.
• Do not clean the air conditioner unit with water. Electric shock may result.
• Tighten all flare nuts to specification using a torque wrench. If tightened too much, the flare nut can break after an extended period and refrigerant can leak out.
1.1. Before installation
Caution:
• Do not use the unit in an unusual environment. If the air conditioner is installed in areas exposed to steam, volatile oil (including machine oil), or sulfuric gas, areas exposed to high salt content such as the seaside, or areas where the unit will be covered by snow, the performance can be significantly reduced and the internal parts can be damaged.
• Do not install the unit where combustible gases may leak, be produced, flow, or accumulate. If combustible gas accumulates around the unit, fire or explo- sion may result.
• The outdoor unit produces condensation during the heating operation. Make sure to provide drainage around the outdoor unit if such condensation is likely to cause damage.
• When installing the unit in a hospital or communications office, be prepared for noise and electronic interference. Inverters, home appliances, high-frequency medical equipment, and radio communications equipment can cause the air conditioner to malfunction or breakdown. The air conditioner may also affect medical equipment, disturbing medical care, and communications equipment, harming the screen display quality.
GB
2. Installation location
2.1. Refrigerant pipe
Refer to Fig. 4-1, 4-2.
2.2. Choosing the outdoor unit installation location
• Avoid locations exposed to direct sunlight or other sources of heat.
• Select a location from which noise emitted by the unit will not inconvenience neigh- bors.
• Select a location permitting easy wiring and pipe access to the power source and indoor unit.
• Avoid locations where combustible gases may leak, be produced, flow, or accumu- late.
• Note that water may drain from the unit during operation.
• Select a level location that can bear the weight and vibration of the unit.
• Avoid locations where the unit can be covered by snow. In areas where heavy snow fall is anticipated, special precautions such as raising the installation location or installing a hood on the air intake must be taken to prevent the snow from block- ing the air intake or blowing directly against it. This can reduce the airflow and a malfunction may result.
• Avoid locations exposed to oil, steam, or sulfuric gas.
• Use the transportation handles of the outdoor unit to transport the unit. If the unit is carried from the bottom, hands or fingers may be pinched.
2.3. Outline dimensions (Outdoor unit) (Fig. 2-1)
Constraints on indoor unit installation
You should note that indoor units that can be connected to this outdoor unit are the following models.
• Indoor units with model numbers 15-140 can be connected.
When using Branch box, Indoor units with model numbers 15-100 can be connected.
Refer to the table 1 below for possible room, indoor unit combinations.
Verification
The rated capacity should be determined by observing the table below. The unit’s quantities are limited as shown in the following table 2. For the next step, make sure that the total rated capacity selected will stay in a range of 50% – 130% of the outdoor unit capacity.
• PUMY-SP112 6.3 – 16.2 kW
• PUMY-SP125 7.1 – 18.2 kW
• PUMY-SP140 8.0 – 20.2 kW Table 1-1 City Multi indoor units
Indoor unit type 15 20 22 25 28 32 36 40 45 50 56 63 Rated capacity
(Cooling) (kW) 1.7 2.2 2.5 2.8 3.2 3.6 4.0 4.5 5.0 5.6 6.3 7.1 Indoor unit type 71 80 100 125 140
Rated capacity
(Cooling) (kW) 8.0 9.0 11.2 14.0 16.0 Table 1-2 M series, P series, S series
Indoor unit type 15 20 22 25 35 42 50 60 71 80 100
Rated capacity
(Cooling) (kW) 1.5 2.0 2.2 2.5 3.5 4.2 5.0 6.0 7.1 8.0 10.0 (mm)
Fig. 2-1
370 1050
225 600
981
Table 2 Connectable indoor units quantities
Model Only system Mixed system
Only City Multi indoor units (Connection without Branch
box)
Only M series, P series, S series indoor units (Connection with Branch box)
One Branch box Two Branch box
Connection with
Branch box City Multi indoor
units Connection with
Branch box City Multi indoor units
PUMY-SP112 1-9 2-8 Max. 5 Max. 5 Max. 7 or 8*1 Max. 3 or 2*1
PUMY-SP125 1-10 2-8 Max. 5 Max. 5 Max. 8 Max. 3
PUMY-SP140 1-12 2-8 Max. 5 Max. 5 Max. 8 Max. 3
*1 When connecting 7 indoor units via branch box, connectable citymulti indoor units are 3; connecting 8 indoor units via branch box, connectable citymulti indoor units are 2.
Table 3 Connectable Branch box quantities
Model Branch box
PUMY-SP112/125/140 1-2
Combinations in which the total capacity of indoor units exceeds the capacity of the outdoor unit will reduce the cooling capacity of each indoor unit below their rated cooling capacity. Thus, combine indoor units with an outdoor unit within the outdoor unit’s capacity, if possible.
330+40
GB 2. Installation location
2.4. Connecting a PEFY-P∙VMA3-E
When using a PEFY-P∙VMA3-E, use the following combinations for the connected indoor units.
PUMY-SP112 PUMY-SP125 PUMY-SP140
OK PEFY-P25VMA3-E × 2
PEFY-P32VMA3-E × 2+
PEFY-P25VMA3-E × 1 PEFY-P32VMA3-E × 3+
PEFY-P32VMA3-E × 2 PEFY-P40VMA3-E × 2+
NO
All combinations excluding the above
combinations All combinations excluding the above
combinations All combinations excluding the above
combinations Ex. 1: PEFY-P25VMA3-E × 2
PEFY-P32VMA-E × 2+ Ex. 2: PEFY-P25VMA3-E × 2
PEFY-P32VMA3-E × 1+ Ex. 3: PEFY-P32VMA3-E × 4
(A combination for a PUMY-SP125) Ex. 4: PEFY-P25VMA3-E × 2
PEFY-P32VMA3-E × 2+ MSZ-FH25VE × 1+
Ex. 1: PEFY-P32VMA3-E × 3 PEFY-P32VMA-E × 1+ Ex. 2: PEFY-P32VMA3-E × 3 Ex. 3: PEFY-P25VMA3-E × 2 PEFY-P32VMA3-E × 2+
(A combination for a PUMY-SP112) Ex. 4: PEFY-P32VMA3-E × 3
PLFY-P20VFM-E × 1+ SEZ-KD25VA × 1+
Ex. 1: PEFY-P32VMA3-E × 3 PEFY-P40VMA-E × 1+ Ex. 2: PEFY-P32VMA3-E × 2
PEFY-P40VMA3-E × 1+ Ex. 3: PEFY-P32VMA3-E × 4
(A combination for a PUMY-SP125) Ex. 4: PEFY-P32VMA3-E × 3
PCFY-P40VKM-E × 1+ MSZ-SF15VA × 1+
Ex. 1: A ceiling-concealed unit other than a VMA3 series is selected. Combinations with a ceiling-concealed different series are not possible.
Ex. 2: The number of units is incorrect.
Ex. 3: The combination is for a unit with a different capacity.
Ex. 4: The combination is not an “OK” combination.
2.5. Connecting a PLFY-EP∙VEM-E
For the PLFY-EP∙VEM-E, up to 2 units can be connected.
Other indoor units*1 can be connected within the total rated capacity and maximum number of connected units.
*1 Excluding the PEFY-P∙VMA3-E and PEFY-P∙VMH-EF.
6
GB
2. Installation location
2.6. Ventilation and service space
2.6.1. When installing a single outdoor unit
Minimum dimensions are as follows, except for Max., meaning Maximum dimen- sions, indicated.
Refer to the figures for each case.
1 Obstacles at rear only (Fig. 2-2)
2 Obstacles at rear and above only (Fig. 2-3) 3 Obstacles at rear and sides only (Fig. 2-4) 4 Obstacles at front only (Fig. 2-5)
∗ When using an optional air outlet guide, the clearance is 500 mm or more.
5 Obstacles at front and rear only (Fig. 2-6)
∗ When using an optional air outlet guide, the clearance is 500 mm or more.
6 Obstacles at rear, sides, and above only (Fig. 2-7)
• Do not install the optional air outlet guides for upward airflow.
2.6.2. When installing multiple outdoor units Leave 25 mm space or more between the units.
1 Obstacles at rear only (Fig. 2-8)
2 Obstacles at rear and above only (Fig. 2-9)
• No more than 3 units must be installed side by side. In addition, leave space as shown.
• Do not install the optional air outlet guides for upward airflow.
3 Obstacles at front only (Fig. 2-10)
∗ When using an optional air outlet guide, the clearance is 1000 mm or more.
4 Obstacles at front and rear only (Fig. 2-11)
∗ When using an optional air outlet guide, the clearance is 1000 mm or more.
5 Single parallel unit arrangement (Fig. 2-12)
∗ When using an optional air outlet guide installed for upward airflow, the clearance is 1000 mm or more.
6 Multiple parallel unit arrangement (Fig. 2-13)
∗ When using an optional air outlet guide installed for upward airflow, the clearance is 1500 mm or more.
7 Stacked unit arrangement (Fig. 2-14)
• The units can be stacked up to 2 units high.
• No more than 2 stacked units must be installed side by side. In addition, leave space as shown.
150
Fig. 2-2
Max.300
1500
500
1500
Fig. 2-9
1000
300
Fig. 2-3
Max.500
Fig. 2-4
300 200
200
Fig. 2-5
1000*
Fig. 2-6
1000*
150
Fig. 2-7
250
250 500
Max.500
Fig. 2-8
300
Fig. 2-10
1500*
Fig. 2-11
1500*
500
Fig. 2-12
1000
600 2000*
150
Fig. 2-13
1500
600
3000*
500
Fig. 2-14
1500
800
150
1500
UNIT: mm
7
GB
B D
600 600
33040 370
225 225
1050
E C A
2.6.3. Windy location installation
When installing the outdoor unit on a rooftop or other location unprotected from the wind, situate the air outlet of the unit so that it is not directly exposed to strong winds.
Strong wind entering the air outlet may impede the normal airflow and a malfunction may result.
The following shows two examples of precautions against strong winds.
1 Install an optional air guide if the unit is installed in a location where strong winds from a typhoon, etc. may directly enter the air outlet. (Fig. 2-15)
A Air guide
2 Position the unit so that the air outlet blows perpendicularly to the seasonal wind direction, if possible. (Fig. 2-16)
B Wind direction
Fig. 2-15 Fig. 2-16
2. Installation location
3. Installing the outdoor unit
• Be sure to install the unit in a sturdy, level surface to prevent rattling noises during operation. (Fig. 3-1)
<Foundation specifications>
Foundation bolt M10 (3/8″)
Thickness of concrete 120 mm
Length of bolt 70 mm
Weight-bearing capacity 320 kg
• Make sure that the length of the foundation bolt is within 30 mm of the bottom surface of the base.
• Secure the base of the unit firmly with four-M10 foundation bolts in sturdy locations.
Installing the outdoor unit
• Do not block the vent. If the vent is blocked, operation will be hindered and break- down may result.
• In addition to the unit base, use the installation holes on the back of the unit to attach wires, etc., if necessary to install the unit. Use self-tapping screws (ø5 × 15 mm or less) and install on site.
Warning:
• The unit must be securely installed on a structure that can sustain its weight.
If the unit is mounted on an unstable structure, it may fall down and cause damage or injuries.
• The unit must be installed according to the instructions in order to minimize the risk of damage from earthquakes, typhoons, or strong winds. An incor- rectly installed unit may fall down and cause damage or injuries.
Caution:
• Install unit on a rigid structure to prevent excessive operation sound or vibra- tion.
Fig. 3-1
4. Installing the refrigerant piping
4.1. Precautions for devices that use R410A refrigerant
• Refer to 1.5. for precautions not included below on using air conditioners with R410A refrigerant.
• Use ester oil, ether oil, alkylbenzene oil (small amount) as the refrigeration oil applied to the flared sections.
• Use C1220 copper phosphorus, for copper and copper alloy seamless pipes, to connect the refrigerant pipes. Use refrigerant pipes with the thicknesses specified in the table to the below. Make sure the insides of the pipes are clean and do not contain any harmful contaminants such as sulfuric compounds, oxidants, debris, or dust.
Warning:
When installing or relocating, or servicing the air conditioner, use only the specified refrigerant (R410A) to charge the refrigerant lines. Do not mix it with any other refrigerant and do not allow air to remain in the lines.
If air is mixed with the refrigerant, then it can be the cause of abnormal high pressure in the refrigerant line, and may result in an explosion and other hazards.
The use of any refrigerant other than that specified for the system will cause mechanical failure or system malfunction or unit breakdown. In the worst case, this could lead to a serious impediment to securing product safety.
Pipe size (mm) ø6.35 ø9.52 ø12.7 ø15.88
Thickness (mm) 0.8 0.8 0.8 1.0
• Do not use pipes thinner than those specified above.
• The thicknesses listed in the table above are based on Japanese standards.
Use pipes with a maximum working pressure of 4.15 MPa [601 PSIG] or higher according to local standards.
B A
A M10 (3/8") bolt B Base
C As long as possible.
(mm)
D Vent
E Set deep in the ground.
Min. 500
Min. 25*
* When installing a single outdoor unit, the clearance is 15 mm or more.
Max. 30
8
GB
B
A
H B C
L r
D e
a
h
b c d
C
C
B A
A
A
a b c d
C D
e f
H h
L
r
C C C
C C
C C C
4. Installing the refrigerant piping
A Outdoor unit B First branch (CMY) C Indoor unit D Cap A+B+C+D+a+b+c+d+e [ 120 m L = A+B+C+D+e [ 70 m ℓ = B+C+D+e [ 50 m
H [ 50 m (Outdoor lower H [ 30 m) h [ 15 m
A+a+b+c+d+e+f [ 120 m L = A+f [ 70 m, ℓ = f [ 50 m H [ 50 m (Outdoor lower H [ 30 m) h [ 15 m
Fig. 4-1
4.1.2. Connection with Branch box (Fig. 4-2) Flared connections
• This unit has flared connections on each indoor unit and branch box and outdoor unit sides.
• Remove the valve cover of the outdoor unit, then connect the pipe.
• Refrigerant pipes are used to connect the branch box and outdoor unit.
Fig. 4-2
B
C
B
C C C
C C C
C L
h2 I b1 b2
c1
a6 a4 a5
a3 a2 h3 h1
H a1
a7 a8 D
A
A Outdoor unit
B Branch box (PAC-MK∙BC(B)) C Indoor unit
D First branch (MSDD)
Permissible length (one-way)
Total piping length c1 + b1 + b2 + a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8 [ 120 m Farthest piping length (L) c1 + b2 + a8 [ 80 m (b2 [ 55 m, a8 [ 25 m)
Piping length between outdoor unit and branch boxes c1 + b1 + b2 [ 55 m Farthest branch box from the first joint (b2) b2 [ 50 m Farthest piping length after branch box (l) a8 [ 25 m
Total piping length between branch boxes and indoor units a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8 [ 95 m Permissible
height difference (one-way)
In indoor/outdoor section (H)*1 H [ 50 m (In case of outdoor unit is set higher than indoor unit) H [ 30 m (In case of outdoor unit is set lower than indoor unit) In branch box/indoor unit section (h1) h1 + h2 [ 15 m
In each branch unit (h2) h2 [ 15 m
In each indoor unit (h3) h3 [ 12 m
Number of bends | c1 + b1 + a1 |, | c1 + b1 + a2 |, | c1 + b1 + a3 |, | c1 + b1 + a4 |, | c1 + b1 + a5 |, | c1 + b2 + a6 |, | c1 + b2 + a7 |, | c1 + b2 + a8 | [ 15
*1 Branch box should be placed within the level between the outdoor unit and indoor units.
A (mm)
A Liquid pipe B Gas pipe
ø9.52 ø15.88
L: The farthest piping length from the outdoor unit to an indoor unit.
B, C, D (mm)
A Liquid pipe B Gas pipe
ø9.52 ø15.88
L: The farthest piping length from the outdoor unit to an indoor unit.
a, b, c, d, e, f (mm)
D Model number A Liquid pipe B Gas pipe
15, 20, 25, 32, 40, 50 a, b, c, d, e, f [ 30 m ø6.35
ø12.7 a, b, c, d, e, f ˃ 30 m ø9.52*1
63, 71, 80, 100, 125, 140 ø9.52 ø15.88
*1 If the piping length after the first joint exceeds 30 m, use a pipe size of ø9.52 for the pipes of the system that exceeds 30 m.
E Branch kit model CMY-Y62-G-E
F 4-Branching header G 8-Branching header
CMY-Y64-G-E CMY-Y68-G-E
* When connecting the CONNECTION KIT (PAC-LV11M-J) and an M-series indoor unit, refer to the installation manual for the CONNECTION KIT when selecting the pipe size and piping length.
4.1.1. Connection without Branch box (Fig. 4-1)
9
GB
A A
A
B B B B B
L
Selecting pipe size (Fig. 4-3)
A B
Liquid (mm) ø9.52
The piping connection size differs according to the type and capacity of indoor units. Match the piping connec- tion size of branch box with indoor unit.
If the piping connection size of branch box does not match the piping connection size of indoor unit, use optional different-diameter (deformed) joints to the branch box side. (Connect deformed joint directly to the branch box side.)
Gas (mm) ø15.88
L: The farthest piping length for the main pipes from the outdoor unit to the branch box.
Different-diameter joint (optional parts) (Fig. 4-4)
Model name Connected pipes diameter Diameter A Diameter B
mm mm mm
MAC-A454JP ø9.52 → ø12.7 ø9.52 ø12.7
MAC-A455JP ø12.7 → ø9.52 ø12.7 ø9.52
MAC-A456JP ø12.7 → ø15.88 ø12.7 ø15.88
PAC-493PI ø6.35 → ø9.52 ø6.35 ø9.52
PAC-SG76RJ-E ø9.52 → ø15.88 ø9.52 ø15.88
Different-diameter joint (optional parts) (Fig. 4-5)
Model name Connected pipes diameter Outside
Diameter A Inside Diameter B
mm mm mm
PAC-SG78RJB-E ø9.52 → ø12.7 ø9.52 ø12.7
PAC-SG79RJB-E ø12.7 → ø9.52 ø12.7 ø9.52
PAC-SG80RJB-E ø12.7 → ø15.88 ø12.7 ø15.88
PAC-SG77RJB-E ø6.35 → ø9.52 ø6.35 ø9.52
PAC-SG76RJB-E ø9.52 → ø15.88 ø9.52 ø15.88
2-branches pipe (Joint) : Optional parts (According to the connection method, you can choose the favorite one.)
Model name Connection method
MSDD-50AR-E flare
MSDD-50BR-E brazing
■ Installation procedure (2 branches pipe (Joint)) Refer to the installation manuals of MSDD-50AR-E.
■ Pipe size (Outdoor unit-Branch box) Pipe size
(ømm) Liquid ø9.52
Gas ø15.88
The lineup of a connectable indoor unit depends on a district/areas/
country.
■ Branch box
Model name Number of connected units PAC-MK3✽BC(B) 3-branches (Max. 3 units) PAC-MK5✽BC(B) 5-branches (Max. 5 units) Note: ✽ = 0, 1, 2, ....
The PAC-MK31/32BC(B) and PAC-MK51/52BC(B) cannot be connected.
■ Pipe size (Branch box–Indoor unit) Case of M series or S series indoor unit Indoor
unit type (kW) 15 – 42 50 60 71 – 80
Pipe size
(ømm) Liquid ø6.35 ø6.35 ø9.52
Gas ø9.52 ø12.7 ø15.88 ø15.88
* If the pipe size of indoor unit is different, use a different-diameter joint.
■ Pipe size (Branch box–Indoor unit) Case of P series indoor unit Indoor
unit type (kW) 35 – 50 60 – 100
Pipe size
(ømm) Liquid ø6.35 ø9.52
Gas ø12.7 ø15.88
*1 The lineup of a connectable indoor unit depends on a district/areas/
country.
*2 When using 35, 50 type indoor unit of P series, use the flare nut attached to the indoor unit.
Do not use the flare nut in the indoor unit accessory. If it is used, a gas leakage or even a pipe extraction may occur.
(1) Valve size for outdoor unit
For liquid ø9.52 mm
For gas ø15.88 mm
(2) Valve size for branch box
A UNIT Liquid pipe ø6.35 mm
Gas pipe ø9.52 mm
B UNIT Liquid pipe ø6.35 mm
Gas pipe ø9.52 mm
C UNIT Liquid pipe ø6.35 mm
Gas pipe ø9.52 mm
D UNIT Liquid pipe ø6.35 mm
Gas pipe ø9.52 mm
E UNIT Liquid pipe ø6.35 mm
Gas pipe ø12.7 mm
* 3-branch type : only A, B, C unit
A B
Fig. 4-4 Fig. 4-3
A
B B B B B
L
Branch box (PAC-MK∙BC(B))
■ In case of using 1-branch box Flare connection employed. (No. brazing)
■ In case of using 2-branch boxes
Branch box #1 (PAC-MK∙BC(B)) 2 branches pipe (joint) (MSDD)
: optional parts.
Branch box #2 (PAC-MK∙BC(B))
Conversion formula 1/4 F ø6.35 3/8 F ø9.52 1/2 F ø12.7 5/8 F ø15.88 3/4 F ø19.05
4. Installing the refrigerant piping
Fig. 4-5
A (outside) B (inside)
GB
4. Installing the refrigerant piping
A
B e1 d2
L2
d1
b1 c1
c2 b2
H h3 h1
C
D
a1
a2 a3
a4 a5 a6 a7 a8
E E E
E E F
F F F F L1
A Outdoor Unit B First joint (CMY, MSDD) C Branch header (CMY) D Branch box (PAC-MK∙BC(B)) E CityMulti Indoor unit F M/S/P series Indoor unit
Permissible
length (One-way) Total piping length e1 + d1 + d2 + c1 + c2 + b1 + b2 + a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8 [ 120 m Farthest piping length (L1) e1 + d2 + a1 or e1 + d1 + c1 + b2 [ 70 m
Farthest piping length. Via Branch box (L2) e1 + d1 + c1 + b1 + a8 [ 80 m Piping length between outdoor unit and branch box e1 + d1 + c1 + b1 [ 55 m Farthest piping length from the first joint d1 + c1 + b1 or d2 + a1 [ 50 m Farthest piping length after branch box a8 [ 25 m
Total piping length between branch boxes and indoor units a4 + a5 + a6 + a7 + a8 [ 95 m Permissible
height difference (One-way)
In indoor/outdoor section (H) *1 H [ 50 m (In case of outdoor unit is set higher than indoor unit) H [ 30 m (In case of outdoor unit is set lower than indoor unit) In branch box/indoor unit section (h1) h1 [ 15 m
In each indoor unit (h3) h3 [ 12 m
Number of bends |e1 + d2 + a1|, |e1 + d2 + a2|, |e1 + d2 + a3|, |e1 + d1 + c2|, |e1 + d1 + c1 + b2|,
|e1 + d1 + c1 + b1 + a4|, |e1 + d1 + c1 + b1 + a5|, |e1 + d1 + c1 + b1 + a6|,
|e1 + d1 + c1 + b1 + a7|, |e1 + d1 + c1 + b1 + a8| [ 15
*1: Branch box should be placed within the level between the outdoor unit and indoor units.
4.1.3-2 In case of using 2-branch boxes A
B d1 c1 L1 L2
c2 b2
b1
h1 h2
H h3
C
D D
a1
a2 a3
a4 a5 a6 a7 a8 a9 a10 a11
E E E
F F F
F F
F F F
A Outdoor Unit B First joint (CMY, MSDD) C Branch header (CMY) D Branch box (PAC-MK∙BC(B)) E CityMulti Indoor unit F M/S/P series Indoor unit
Permissible
length (One-way) Total piping length d1 + c1 + c2 + b1 + b2 + a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8 + a9 + a10 + a11 [ 120 m
Farthest piping length (L1) d1 + c1 + a1 [ 70 m
Farthest piping length. Via Branch box (L2) d1 + c2 + b2 + a11 [ 80 m Piping length between outdoor unit and branch boxes d1 + c2 + b1 + b2 [ 55 m Farthest piping length from the first joint c2 + b2 or c1 + a1 [ 50 m Farthest piping length after branch box a11 [ 25 m
Farthest branch box from outdoor unit d1 + c2 + b2 [ 55 m
Total piping length between branch boxes and indoor units a4 + a5 + a6 + a7 + a8 + a9 + a10 + a11 [ 95 m Permissible
height difference (One-way)
In indoor/outdoor section (H) *1 H [ 50 m (In case of outdoor unit is set higher than indoor unit) H [ 30 m (In case of outdoor unit is set lower than indoor unit) In branch box/indoor unit section (h1+h2) h1 + h2 [ 15 m
In each branch unit (h1) h2 [ 15 m
In each indoor unit (h3) h3 [ 12 m
Number of bends |d1 + c1 + a1|, |d1 + c1 + a2|, |d1 + c1 + a3|, |d1 + c2 + b1 + a4|, |d1 + c2 + b1 + a5|, |d1 + c2 + b1 + a6|, |d1 + c2 + b1 + a7|, |d1 + c2 + b1 + a8|, |d1 + c2 + b2 + a9|, |d1 + c2 + b2 + a10|, |d1 + c2 + b2 + a11| [ 15
*1: Branch box should be placed within the level between the outdoor unit and indoor units.
4.1.3. Mixed system (City Multi indoor units and M/S/P series indoor units via Branch box) 4.1.3-1 In case of using 1-branch box
GB 4. Installing the refrigerant piping
Branch box Port A Port B Port C Port D Port E Branch box pipe size 4.1.3-3 Selecting pipe size
System pipe size Pipe size
A, B, C, D, E
A Liquid pipe B Gas pipe
ø9.52 ø15.88
L1: The farthest piping length from the outdoor unit to an indoor unit.
L2: The farthest piping length for the main pipes from the outdoor unit to the branch box.
L3: The farthest piping length from the first joint.
a, b, c – j
Indoor unit series Model number A Liquid pipe B Gas pipe City Multi
15 – 50 L3 [ 30m ø6.35 ø12.7 L3 ˃ 30m ø9.52*1
63 – 140 ø9.52 ø15.88
M series or S series 15 – 42 ø6.35 ø9.52
50 ø6.35 ø12.7
60 ø6.35 ø15.88
71, 80 ø9.52 ø15.88
P series 35 – 50 ø6.35 ø12.7
60 – 100 ø9.52 ø15.88
* If the pipe size of indoor unit is different, use a different-diameter joint.
*1 If the piping length after the first joint exceeds 30 m, use a pipe size of ø9.52 for the pipes of the system that exceeds 30 m.
2-branch joint CMY-Y62-G-E 4-branch header CMY-Y64-G-E 8-branch header CMY-Y68-G-E A
A
E
B C
C D
D
a
b c
d e
f g h i j
E E E
E E F
F F F F L2
L1 L3
(1) Valve size for outdoor unit
For liquid ø9.52 mm
For gas ø15.88 mm
(2) Valve size for branch box
A UNIT Liquid pipe ø6.35 mm
Gas pipe ø9.52 mm
B UNIT Liquid pipe ø6.35 mm
Gas pipe ø9.52 mm
C UNIT Liquid pipe ø6.35 mm
Gas pipe ø9.52 mm
D UNIT Liquid pipe ø6.35 mm
Gas pipe ø9.52 mm
E UNIT Liquid pipe ø6.35 mm
Gas pipe ø12.7 mm
* 3-branch type : only A, B, C unit
Different-diameter joint (optional parts) (Fig. 4-6)
Model name Connected pipes diameter Diameter A Diameter B
mm mm mm
MAC-A454JP ø9.52 → ø12.7 ø9.52 ø12.7
MAC-A455JP ø12.7 → ø9.52 ø12.7 ø9.52
MAC-A456JP ø12.7 → ø15.88 ø12.7 ø15.88
PAC-493PI ø6.35 → ø9.52 ø6.35 ø9.52
PAC-SG76RJ-E ø9.52 → ø15.88 ø9.52 ø15.88
Different-diameter joint (optional parts) (Fig. 4-7)
Model name Connected pipes diameter Outside
Diameter A Inside Diameter B
mm mm mm
PAC-SG78RJB-E ø9.52 → ø12.7 ø9.52 ø12.7
PAC-SG79RJB-E ø12.7 → ø9.52 ø12.7 ø9.52
PAC-SG80RJB-E ø12.7 → ø15.88 ø12.7 ø15.88
PAC-SG77RJB-E ø6.35 → ø9.52 ø6.35 ø9.52
PAC-SG76RJB-E ø9.52 → ø15.88 ø9.52 ø15.88
2-branch pipe (Joint): Optional parts (According to the connection method, you can choose the favorite one.)
Model name Connection method
MSDD-50AR-E flare
MSDD-50BR-E brazing
Branch box
Model name Number of connected units PAC-MK3✽BC(B) 3-branches (Max. 3 units) PAC-MK5✽BC(B) 5-branches (Max. 5 units) Note: ✽ = 0, 1, 2, ....
The PAC-MK31/32BC(B) and PAC-MK51/52BC(B) cannot be connected.
A Outdoor Unit B First joint (CMY, MSDD) C Branch header (CMY) D Branch box (PAC-MK·BC(B)) E City Multi Indoor unit F M/S/P series Indoor unit
A B
Fig. 4-6
Conversion formula 1/4 F ø6.35 3/8 F ø9.52 1/2 F ø12.7 5/8 F ø15.88 3/4 F ø19.05
Fig. 4-7
A (outside) B (inside)
GB
A Flare cutting dimensions B Flare nut tightening torque
A Die B Copper pipe
Fig. 4-8
A
Fig. 4-9
A (Fig. 4-8)
B (Fig. 4-8)
90°± 0.5° øA
45°± 2°
R0.4 - R0.8
Copper pipe O.D.
(mm) Flare dimensions
øA dimensions (mm)
ø6.35 8.7 - 9.1
ø9.52 12.8 - 13.2
ø12.7 16.2 - 16.6
ø15.88 19.3 - 19.7
ø19.05 23.6 - 24.0
Copper pipe O.D.
(mm) Flare nut O.D.
(mm) Tightening torque
(N·m)
ø6.35 17 14 - 18
ø6.35 22 34 - 42
ø9.52 22 34 - 42
ø12.7 26 49 - 61
ø12.7 29 68 - 82
ø15.88 29 68 - 82
ø15.88 36 100 - 120
ø19.05 36 100 - 120
4.2. Connecting pipes (Fig. 4-8)
Fig. 4-1, 4-2 is a sample of piping system.
• Conduct sufficient anti-condensation and insulation work to prevent water dripping from the refrigerant piping. (liquid pipe/gas pipe)
• Increase insulation depending on the environment where the refrigerant piping is installed, or condensation may occur on the surface of the insulation material.
(Insulation material Heat-resistant temperature: 120 °C, Thickness: 15 mm or more)
* When the refrigerant piping is used in locations subject to high temperature and humidity such as in the attic, further addition of insulation may be required.
• To insulate the refrigerant piping, apply heat-resistant polyethylene foam between the indoor unit and insulation material as well as to the net between the insulation material filling all gaps.
(Condensation forming on the piping may result in condensation in the room or burns when contacting the piping.)
• Be sure to separate thermal insulation for gas and liquid refrigerant pipes.
• The indoor parts of the drain pipe should be wrapped with polyethylene foam insula- tion materials (specific gravity of 0.03, thickness of 9 mm or more).
• Apply thin layer of refrigerant oil to pipe and joint seating surface before tightening flare nut. A
• Use 2 wrenches to tighten piping connections. B
• Use leak detector or soapy water to check for gas leaks after connections are completed.
• Apply refrigerating machine oil over the entire flare seat surface. C
• Use the flare nuts for the following pipe size. D
City Multi Indoor unit
Outdoor unit
15-50 63-140
Gas side Pipe size (mm) ø12.7 ø15.88 ø15.88
Liquid side Pipe size (mm) ø6.35*1 ø9.52 ø9.52
*1 If the farthest piping length after the first joint exceeds 30 m, use a pipe size of ø9.52.
• When bending the pipes, be careful not to break them. Bend radius of 100 mm to 150 mm is sufficient.
• Make sure the pipes do not contact the compressor. Abnormal noise or vibration may result.
1 Pipes must be connected starting from the indoor unit.
Flare nuts must be tightened with a torque wrench.
2 Flare the liquid pipes and gas pipes and apply a thin layer of refrigeration oil (Ap- plied on site).
• When usual pipe sealing is used, refer to Table 3 for flaring of R410A refrigerant pipes.
The size adjustment gauge can be used to confirm A measurements.
* To connect the CONNECTION KIT (PAC-LV11M-J), refer to the installation manual for the CONNECTION KIT.
Table 3 (Fig. 4-9) Copper pipe O.D.
(mm)
A (mm)
Flare tool for R410A Flare tool for R22·R407C Clutch type
ø6.35 (1/4") 0 - 0.5 1.0 - 1.5
ø9.52 (3/8") 0 - 0.5 1.0 - 1.5
ø12.7 (1/2") 0 - 0.5 1.0 - 1.5
ø15.88 (5/8") 0 - 0.5 1.0 - 1.5
ø19.05 (3/4") 0 - 0.5 1.0 - 1.5
4. Installing the refrigerant piping
13
GB
4.3. Refrigerant piping (Fig. 4-10)
Remove the service panel D (three screws) and the front piping cover A (two screws) and rear piping cover B (five screws).
1 Perform refrigerant piping connections for the indoor/outdoor unit when the outdoor unit’s stop valve is completely closed.
2 Vacuum-purge air from the indoor unit and the connection piping.
3 After connecting the refrigerant pipes, check the connected pipes and the indoor unit for gas leaks. (Refer to 4.4. Refrigerant pipe airtight testing method) 4 Vacuumize the refrigerant lines through the service port of the liquid and gas stop
valves. And then open the stop valves completely (for both the liquid and gas stop valves). This will completely connect the refrigerant lines of the indoor and outdoor units.
• If the stop valves are left closed and the unit is operated, the compressor and control valves will be damaged.
• Use a leak detector or soapy water to check for gas leaks at the pipe connec- tion sections of the outdoor unit.
• Do not use the refrigerant from the unit to purge air from the refrigerant lines.
• After the valve work is completed, tighten the valve caps to the correct torque:
20 to 25 N·m (200 to 250 kgf·cm).
Failure to replace and tighten the caps may result in refrigerant leakage. In addition, do not damage the insides of the valve caps as they act as a seal to prevent refrigerant leakage.
5 Use sealant to seal the ends of the thermal insulation around the pipe connection sections to prevent water from entering the thermal insulation.
4.4. Refrigerant pipe airtight testing method
(1) Connect the testing tools.
• Make sure the stop valves AB are closed and do not open them.
• Add pressure to the refrigerant lines through the service port C of the liquid stop valve A and the gas stop valve B.
(2) Do not add pressure to the specified pressure all at once; add pressure little by little.
1 Pressurize to 0.5 MPa (5 kgf/cm2G), wait five minutes, and make sure the pressure does not decrease.
2 Pressurize to 1.5 MPa (15 kgf/cm2G), wait five minutes, and make sure the pressure does not decrease.
3 Pressurize to 4.15 MPa (41.5 kgf/cm2G) and measure the surrounding tem- perature and refrigerant pressure.
(3) If the specified pressure holds for about one day and does not decrease, the pipes have passed the test and there are no leaks.
• If the surrounding temperature changes by 1°C, the pressure will change by about 0.01 MPa (0.1 kgf/cm2G). Make the necessary corrections.
(4) If the pressure decreases in steps (2) or (3), there is a gas leak. Look for the source of the gas leak.
Fig. 4-10
A Front piping cover B Piping cover C Stop valve
D
A
B C
F E 4. Installing the refrigerant piping
Fig. 4-11
A Stop valve <Liquid side>
B Stop valve <Gas side>
C Service port D Open/Close section
E Local pipe
F Sealed, same way for gas side G Pipe cover
A B
C D E F G
D E F G C
D Service panel
E Bend radius : 100 mm - 150 mm F Strap
GB
4. Installing the refrigerant piping
4.6. Additional refrigerant charge
Additional refrigerant charge
Refrigerant for the extended piping is not included in the outdoor unit when the unit is shipped from the factory. Therefore, charge each refrigerant piping system with addi- tional refrigerant at the installation site. In addition, in order to carry out service, enter the size and length of each liquid pipe and additional refrigerant charge amounts in the spaces provided on the “Refrigerant amount” plate on the outdoor unit.
Calculation of additional refrigerant charge
• Calculate the additional charge using the liquid pipe size and length of the ex- tended piping.
• Calculate the additional refrigerant charge using the procedure shown to the right, and charge with the additional refrigerant.
• For amounts less than 0.1 kg, round up the calculated additional refrigerant charge.
(For example, if the calculated charge is 32.92 kg, round up the charge to 33.0 kg.)
<Additional Charge>
Calculation of refrigerant charge Pipe size
Liquid pipe
+
Pipe size Liquid pipe
+
Total capacity of
connected indoor units Amount for the indoor units
ø6.35 ø9.52 ~ 8.0 kW 1.5 kg
(m) × 19.0 (g/m) (m) × 50.0 (g/m) 8.1 ~ 16.0 kW 2.5 kg
16.1 ~ 20.4 kW 3.0 kg
Included refrigerant amount when shipped from the factory Included refrigerant amount
3.5 kg
Calculation example (Please see the lower half of Fig. 4-1.) Outdoor model : SP140 A : ø9.52 [3/8"]/ø15.88 [5/8"] : 30 m 1: P100 (11.2 kW) a : ø9.52 [3/8"]/ø15.88 [5/8"] : 15 m 2: P40 (4.5 kW) b : ø6.35 [1/4"]/ø12.7 [1/2"] : 10 m The total length of each pipe size is as follows:
ø9.52 [3/8"]/ø15.88 [5/8"] : A = 30 m ø9.52 [3/8"]/ø15.88 [5/8"] : a = 15 m ø6.35 [1/4"]/ø12.7 [1/2"] : b = 10 m
The total capacity of connected indoor unit is as follows:
11.2 + 4.5 = 15.7
Therefore, the additional charge is as follows:
= 10 × 19.0
+ (30 + 15) × 50.0 + 2.5
1000 1000
= 5.0 kg
For these piping lengths
4.5. Stop valve opening method
The stop valve opening method varies according to the outdoor unit model. Use the appropriate method to open the stop valves.
(1) Gas side (Fig. 4-12)
1 Remove the cap and turn the valve rod counterclockwise as far as it will go with the use of a 5 mm hexagonal wrench. Stop turning when it hits the stopper.
(ø15.88: Approximately 13 revolutions)
2 Make sure that the stop valve is open completely and rotate the cap back to its original position.
(2) Liquid side (Fig. 4-13)
1 Remove the cap and turn the valve rod counterclockwise as far as it will go with the use of a 4 mm hexagonal wrench. Stop turning when it hits the stopper.
(ø9.52: Approximately 10 revolutions)
2 Make sure that the stop valve is open completely, push in the handle and rotate the cap back to its original position.
Refrigerant pipes are protectively wrapped
• The pipes can be protectively wrapped up to a diameter of ø90 before or after con- necting the pipes. Cut out the knockout in the pipe cover following the groove and wrap the pipes.
Pipe inlet gap
• Use putty or sealant to seal the pipe inlet around the pipes so that no gaps remain.
(If the gaps are not closed, noise may be emitted or water and dust will enter the unit and breakdown may result.)
Warning:
When installing the unit, securely connect the refrigerant pipes before starting the compressor.
Precautions when using the charge valve (Fig. 4-14)
Do not tighten the service port too much when installing it, otherwise, the valve core could be deformed and become loose, causing a gas leak.
After positioning section B in the desired direction, turn section A only and tighten it.
Do not further tighten sections A and B together after tightening section A.
B C
A
D
* The figure to the left is an example only. The stop valve shape, service port position, etc., may vary according to the model.
* Turn section A only.
(Do not further tighten sections A and B together.)
C Charge hose D Service port
Fig. 4-14
Fig. 4-12 Fig. 4-13
H Double spanner section
(Do not apply a spanner other than to this section. Doing so would cause coolant leaks.)
I Seal section
(Seal the end of the heat insulation material at the pipe connection section with whatever seal material you have on hand so that water does not infiltrate the heat insulation material.)
A Valve B Unit side C Cap D Local pipe side E Pipe cover F Service port G Wrench hole
(1) (2)
H H
E E
F F
A A
G G
I I
D D
C C
B B
GB 5. Drainage piping work
Outdoor unit drainage pipe connection
When drain piping is necessary, use the drain socket or the drain pan (option).
Drain socket PAC-SG61DS-E
Drain pan PAC-SH97DP-E
6. Electrical work
M1 M2S M1 M2S
TB3 TB7
D
E F A
TB1B C
L N B1 B2
A Power source
B Power supply for branch box C Screw on the electrical component box D Transmission line
6.2. Control box and connecting position of wiring (Fig. 6-1)
1. Connect the indoor unit transmission line to transmission terminal block (TB3), or connect the wiring between outdoor units or the wiring with the centralized control system to the centralized control terminal block (TB7).
When using shielded wiring, connect shield ground of the indoor unit transmission line to the screw (F) and connect shield ground of the line between outdoor units and the centralized control system transmission line to the shield (S) terminal of the centralized control terminal block (TB7). In addition, in the case of outdoor units whose power supply connector CN41 has been replaced by CN40, the shield terminal (S) of terminal block (TB7) of the centralized control system should also be connected to the screw (F) using attached lead wire.
2. Conduit mounting plates (ø27) are being provided. Pass the power supply and transmission wires through the appropriate knock-out holes, then remove the knock-out piece from the bottom of the terminal block and connect the wires.
3. Fix power source wiring to the terminal block by using buffer bushing for tensile force (PG connection or the like).
4. The terminal block (TB1B) is for supplying power to the branch box (220 – 240 VAC. max 6 A).
Caution:
Never connect the transmission line for the indoor unit or the centralized control system transmission line to this terminal block (TB1B). If the transmission lines are connected, the indoor unit or centralized control could be damaged.
Fig. 6-1
<PUMY-SP·VKM>
M1 M2S M1 M2S
TB3 TB7
B1 B2
TB1B
B C
E F D
L1 L2 L3 N
TB1
A
<PUMY-SP·YKM>
E Ground for the terminal block (TB3) F Screw on the electrical component box
6.1. Caution
1 Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring regulations and guidance of each electric power company.
2 Wiring for control (hereinafter referred to as transmission line) shall be (5 cm or more) apart from power source wiring so that it is not influenced by electric noise from power source wiring. (Do not insert transmission line and power source wire in the same conduit.)
3 Be sure to provide designated grounding work to outdoor unit.
4 Give some allowance to wiring for electrical part box of indoor and outdoor units, because the box is sometimes removed at the time of service work.
5 Never connect the main power source to terminal block of transmission line. If connected, electrical parts will be burnt out.
6 Use 2-core shield cable for transmission line. If transmission lines of different systems are wired with the same multiplecore cable, the resultant poor transmit- ting and receiving will cause erroneous operations.
7 Only the transmission line specified should be connected to the terminal block for outdoor unit transmission.
(Transmission line to be connected with indoor unit : Terminal block TB3 for transmission line, Other : Terminal block TB7 for centralized control)
Erroneous connection does not allow the system to operate.
8 In case to connect with the upper class controller or to conduct group operation in different refrigerant systems, the control line for transmission is required between the outdoor units each other.
Connect this control line between the terminal blocks for centralized control. (2- wire line with no polarity)
When conducting group operation in different refrigerant systems without connect- ing to the upper class controller, replace the insertion of the short circuit connector from CN41 of one outdoor unit to CN40.
9 Group is set by operating the remote controller.
0 When connecting the CONNECTION KIT (PAC-LV11M-J) and an M-series indoor unit, refer to the installation manual for the CONNECTION KIT.
1 When connecting a branch box, be sure to turn on the indoor units and the branch box before turning on the outdoor unit.
2 Use the strap on the unit to sufficiently fasten the cables connected to the termi- nal blocks. In addition, make sure that the fastened cables and the strap do not interfere with the panels.
16
GB Example of a group operation system with multiple outdoor units (Shielding wires and address setting are necessary.)
<Examples of Transmission Cable Wiring>
■Refer to Fig. 6-6 from Fig. 6-2.
<Wiring Method and Address Settings>
a. Always use shielded wire when making connections between the outdoor unit (OC) and the indoor unit (IC), as well for all OC-OC, and IC-IC wiring intervals.
b. Use feed wiring to connect terminals M1 and M2 and the ground terminal on the transmission cable terminal block (TB3) of each outdoor unit (OC) to terminals M1, M2 and terminal S on the transmission cable block of the indoor unit (IC).
c. Connect terminals 1 (M1) and 2 (M2) on the transmission cable terminal block of the indoor unit (IC) that has the most recent address within the same group to the terminal block on the remote controller (RC).
d. Connect together terminals M1, M2 and terminal S on the terminal block for centralized control (TB7) for the outdoor unit (OC).
e. The jumper connector CN41 on the control panel does not change.
f. Connect shield ground of the indoor units transmission line to the shield (S) terminal of (TB3) and also connect (S) terminal to the screw (E or F) using attached lead wire.
Connect shield ground of the line between outdoor units and the centralized control system transmission line to the shield (S) terminal of (TB7).
g. Set the address setting switch as follows.
Unit Range Setting Method
M-IC (Main) 01 to 50 Use the most recent address within the same group of indoor units
M-IC (Sub) 01 to 50 Use an address, other than that of the IC (Main) from among the units within the same group of indoor units. This must be in sequence with the IC (Main)
Outdoor unit 51 to 100 Use the most recent address of all the indoor units plus 50
* The address automatically becomes “100” if it is set as “01 - 50”.
M-NET RC (Main) *1 101 to 150 Set at an IC (Main) address within the same group plus 100 M-NET RC (Sub) *1 151 to 200 Set at an IC (Main) address within the same group plus 150 MA RC — Unnecessary address setting (Necessary main/sub setting)
*1 An ME remote controller cannot be connected to a system that contains a branch box.
h. The group setting operations among the multiple indoor units is done by the remote controller (M-NET RC) after the electrical power has been turned on.
<Permissible Lengths>
1 M-NET Remote controller
• Max length via outdoor units: L1+L2+L3+L4 and L1+L2+L3+L5 and L1+L2+L6+L7[ 500 m (1.25 mm² or more)
• Max transmission cable length: L1 and L3+L4 and L3+L5 and L2+L6 and L7[ 200 m (1.25 mm² or more)
• Remote controller cable length:r1, r2, r2+r3, r4[ 10 m (0.5 to 1.25 mm²)
If the length exceeds 10 m, use a 1.25 mm² shielded wire. The length of this section (L8) should be included in the calculation of the maximum length and overall length.
2 MA Remote controller
• Max length via outdoor unit (M-NET cable): L1+L2+L3+L4 and L1+L2+L6+L7[ 500 m (1.25 mm² or more)
• Max transmission cable length (M-NET cable): L1 and L3+L4 and L2+L6 and L7[ 200 m (1.25 mm² or more)
• Remote controller cable length: c1 and c1+c2+c3 and c1+c2+c3+c4[ 200 m (0.3 to 1.25 mm²)
6. Electrical work
6.3. Wiring transmission cables
1 Types of control cables 1. Wiring transmission cables
• Types of transmission cables: Shielding wire CVVS, CPEVS or MVVS
• Cable diameter: More than 1.25 mm2
• Maximum wiring length: Within 200 m 2. M-NET Remote control cables
Kind of remote control cable Shielding wire CVVS, CPEVS or MVVS Cable diameter 0.5 to 1.25 mm2 (0.75 to 1.25 mm2)*
Remarks When 10 m is exceeded, use cable with the same specifications as transmission line wiring cables.
* Connected with simple remote controller.
3. MA Remote control cables
Kind of remote control cable Sheathed 2-core cable (unshielded) CVV Cable diameter 0.3 to 1.25 mm2 (0.75 to 1.25 mm2)*
Remarks Within 200 m
* Connected with simple remote controller.
2 Wiring examples
• Controller name, symbol and allowable number of controllers.
Name Symbol Allowable number of controllers
Outdoor unit controller OC –
Indoor unit controller
M-IC PUMY-SP112 1 to 9 units per 1 OC *1 PUMY-SP125 1 to 10 units per 1 OC *1 PUMY-SP140 1 to 12 units per 1 OC *1
A-IC PUMY-SP112
2 to 8 units per 1 OC *1 PUMY-SP125
PUMY-SP140
Branch box – – 0 to 2 units per 1 OC
Remote controller RC M-NET RC *2, *3
Maximum of 12 control- lers for 1 OC (Can not be connected if Branch box is used.)
MA-RC Maximum of 2 per group Note:
*1. The number of connectable units may be limited by some conditions such as an indoor unit’s capacity or each unit’s equivalent power consumption.
*2. Don’t use the Lossnay controller (PZ-61DR-E, PZ-43SMF-E, PZ-52SF-E, PZ-60DR-E).
*3. An ME remote controller can not be connected to a system that contains a branch box.